JP6380043B2 - Power storage module - Google Patents

Power storage module Download PDF

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Publication number
JP6380043B2
JP6380043B2 JP2014236740A JP2014236740A JP6380043B2 JP 6380043 B2 JP6380043 B2 JP 6380043B2 JP 2014236740 A JP2014236740 A JP 2014236740A JP 2014236740 A JP2014236740 A JP 2014236740A JP 6380043 B2 JP6380043 B2 JP 6380043B2
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terminal
power storage
lead terminal
metal
joined
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JP2016100210A (en
Inventor
清水　宏
宏 清水
平光　宏臣
宏臣 平光
克司 宮▲崎▼
克司 宮▲崎▼
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Sumitomo Wiring Systems Ltd
AutoNetworks Technologies Ltd
Sumitomo Electric Industries Ltd
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Sumitomo Wiring Systems Ltd
AutoNetworks Technologies Ltd
Sumitomo Electric Industries Ltd
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Priority to JP2014236740A priority Critical patent/JP6380043B2/en
Priority to PCT/JP2015/081131 priority patent/WO2016080196A1/en
Priority to US15/523,984 priority patent/US10418613B2/en
Priority to CN201580062163.5A priority patent/CN107004816B/en
Publication of JP2016100210A publication Critical patent/JP2016100210A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G2/00—Details of capacitors not covered by a single one of groups H01G4/00-H01G11/00
    • H01G2/02—Mountings
    • H01G2/04—Mountings specially adapted for mounting on a chassis
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/10—Multiple hybrid or EDL capacitors, e.g. arrays or modules
    • H01G11/12—Stacked hybrid or EDL capacitors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/74—Terminals, e.g. extensions of current collectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/74—Terminals, e.g. extensions of current collectors
    • H01G11/76—Terminals, e.g. extensions of current collectors specially adapted for integration in multiple or stacked hybrid or EDL capacitors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G11/00—Hybrid capacitors, i.e. capacitors having different positive and negative electrodes; Electric double-layer [EDL] capacitors; Processes for the manufacture thereof or of parts thereof
    • H01G11/78—Cases; Housings; Encapsulations; Mountings
    • H01G11/82—Fixing or assembling a capacitive element in a housing, e.g. mounting electrodes, current collectors or terminals in containers or encapsulations
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/60—Heating or cooling; Temperature control
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/647—Prismatic or flat cells, e.g. pouch cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
    • H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
    • H01M50/211—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for pouch cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/503—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the shape of the interconnectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/502—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing
    • H01M50/521—Interconnectors for connecting terminals of adjacent batteries; Interconnectors for connecting cells outside a battery casing characterised by the material
    • H01M50/522—Inorganic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/547—Terminals characterised by the disposition of the terminals on the cells
    • H01M50/548—Terminals characterised by the disposition of the terminals on the cells on opposite sides of the cell
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/552—Terminals characterised by their shape
    • H01M50/553—Terminals adapted for prismatic, pouch or rectangular cells
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/543—Terminals
    • H01M50/562—Terminals characterised by the material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
    • H01M50/105—Pouches or flexible bags
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Inorganic Chemistry (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Electric Double-Layer Capacitors Or The Like (AREA)

Description

本発明は、蓄電モジュールに関する。   The present invention relates to a power storage module.

複数の蓄電素子を積層してなる蓄電モジュールにおいては、隣り合う蓄電素子のリード端子同士を超音波溶接により接続することがある。このような場合、蓄電モジュールに、溶接治具を挿入する隙間を確保する必要があるため、蓄電素子の積層数が制限されたり、全体として大型化することがある。   In a power storage module in which a plurality of power storage elements are stacked, lead terminals of adjacent power storage elements may be connected by ultrasonic welding. In such a case, since it is necessary to secure a gap for inserting a welding jig in the power storage module, the number of stacked power storage elements may be limited, or the overall size may be increased.

上記問題を解決する手法としては、リード端子同士をレーザー溶接により接合する方法がある。しかしながら、例えば、アルミニウム製の正極端子と銅製の負極端子とを接合する場合のように、２つの電極端子を構成する金属材料が相違する場合、レーザー溶接による接合が困難である。   As a method for solving the above problem, there is a method of joining lead terminals by laser welding. However, for example, when the metal materials constituting the two electrode terminals are different, as in the case of joining an aluminum positive electrode terminal and a copper negative electrode terminal, joining by laser welding is difficult.

そこで、接続される電極端子を構成する金属材料が相違する場合には、正極端子と同種の金属材料からなる第１の金属材と、負極端子と同種の金属材料からなる第２の金属材とを圧接して得られるクラッド材をバスバーとして用いることが考えられた（例えば特許文献１を参照）。   Therefore, when the metal materials constituting the electrode terminals to be connected are different, the first metal material made of the same metal material as the positive electrode terminal, and the second metal material made of the same metal material as the negative electrode terminal; It has been considered to use a clad material obtained by pressure welding as a bus bar (see, for example, Patent Document 1).

特開２０１１−２１０４８２号公報JP 2011-210482A

バスバーを構成するクラッド材が、第１の金属材と第２の金属材とが並列している構成である場合、異種金属が重なる重複領域が存在する。異種金属の重複領域と電極端子とをレーザー溶接した場合、合金相が形成されて、端子とバスバーとの接合部が非常に脆くなるおそれがあるため、積層間隔の狭いラミネートタイプの蓄電素子を接続するバスバーに適用することが難しかった。   When the clad material constituting the bus bar has a configuration in which the first metal material and the second metal material are arranged in parallel, there is an overlapping region where different metals overlap. When laser welding the dissimilar metal overlap area and the electrode terminal, an alloy phase is formed and the joint between the terminal and bus bar may become very brittle. It was difficult to apply to a bus bar.

本発明は上記のような事情に基づいて完成されたものであって、限られたスペースで、相違する金属材料からなるリード端子間を電気的に接続可能とした蓄電モジュールを提供することを目的とする。   The present invention has been completed based on the above-described circumstances, and an object thereof is to provide a power storage module capable of electrically connecting lead terminals made of different metal materials in a limited space. And

本発明は、側縁から突出する正極および負極のリード端子を有する蓄電素子を複数積層してなる蓄電素子群と、前記リード端子に接合され前記蓄電素子を電気的に接続する接続部材と、を備え、正極リード端子と負極リード端子とは相違する金属材料からなり、前記接続部材は、前記正極リード端子に接続されるとともに前記正極リード端子と同じ金属材料からなる第１金属部と、前記負極リード端子に接続されるとともに前記負極リード端子と同じ金属材料からなる第２金属部と、を接合してなり、前記第１金属部および前記第２金属部は、それぞれ、前記リード端子と接合される端子接合部と、前記第１金属部と前記第２金属部とが接合される部材接合部とを有し、前記端子接合部と前記部材接合部とは、交差する方向に配されており、前記部材接合部は、前記端子接合部の長手方向における一対の側縁のうち一方の側縁に連なって形成されており、前記第１金属部と前記第２金属部のそれぞれの前記端子接合部には、前記リード端子が２つ以上接合されている蓄電モジュールである。
The present invention includes a power storage element group formed by stacking a plurality of power storage elements having positive and negative lead terminals protruding from a side edge, and a connection member that is joined to the lead terminals and electrically connects the power storage elements. The positive electrode lead terminal and the negative electrode lead terminal are made of different metal materials, and the connecting member is connected to the positive electrode lead terminal and is made of the same metal material as the positive electrode lead terminal, and the negative electrode A second metal part that is connected to the lead terminal and made of the same metal material as the negative electrode lead terminal is joined, and the first metal part and the second metal part are joined to the lead terminal, respectively. A terminal joint portion and a member joint portion to which the first metal portion and the second metal portion are joined, and the terminal joint portion and the member joint portion are arranged in an intersecting direction. , Serial member joint, the are formed continuous to one side edge of the pair of side edges in the longitudinal direction of the terminal junctions, each of the terminal connection region between the first metal part and the second metal portion Is a power storage module in which two or more lead terminals are joined .

本発明において、接続部材は正極リード端子と同じ金属材料からなる第１金属部と、負極リード端子と同じ金属材料からなる第２金属部と、を接合してなる。接続部材において、第１金属部および第２金属部は、それぞれ、リード端子と接合される端子接合部と、第１金属部と第２金属部とが接合される部材接合部とを有し、端子接合部と部材接合部とは、交差する方向に配されている。   In the present invention, the connecting member is formed by joining a first metal part made of the same metal material as the positive electrode lead terminal and a second metal part made of the same metal material as the negative electrode lead terminal. In the connecting member, each of the first metal part and the second metal part has a terminal joint part joined to the lead terminal, and a member joint part joined to the first metal part and the second metal part, The terminal joint portion and the member joint portion are arranged in the intersecting direction.

したがって本発明によれば、接続部材において、二つの金属部同士が接合される部材接合部と、リード端子と接合される端子接合部とが交差する方向に配されるので、接続部材にリード端子を接合する際に異種金属が重なる領域にリード端子が接合されることがない。その結果、本発明によれば、端子接合部の全域にリード端子を溶接することができるので、限られたスペースで、相違する金属材料からなるリード端子間を電気的に接続可能とした蓄電モジュールを提供することができる。   Therefore, according to the present invention, in the connecting member, the member connecting portion where the two metal portions are bonded to each other and the terminal connecting portion bonded to the lead terminal are arranged in a crossing direction. When joining the lead terminals, the lead terminals are not joined to the region where the dissimilar metals overlap. As a result, according to the present invention, since the lead terminals can be welded to the entire area of the terminal joint portion, the power storage module capable of electrically connecting the lead terminals made of different metal materials in a limited space. Can be provided.

さらに本発明によれば、正極リード端子が同じ金属材料からなる第１金属部に接合され、かつ負極リード端子が同じ金属材料からなる第２金属部に接合されるので、接合部分において異種金属の接触による腐食が発生しにくい。   Furthermore, according to the present invention, the positive electrode lead terminal is joined to the first metal part made of the same metal material, and the negative electrode lead terminal is joined to the second metal part made of the same metal material. Corrosion due to contact is unlikely to occur.

本発明は以下の構成としてもよい。
絶縁材料からなり、前記接続部材を保持する保持部材を備え、前記接続部材には前記保持部材に固定される固定部が前記端子接合部に対して交差する方向に配されるとともに前記端子接合部よりも前記端子接合部の長手方向外側に突出して設けられていてもよい。
このような構成とすると、接続部材において、保持部材に固定される固定部が、リード端子と接合される端子接合部に対して交差する方向で、かつ、端子接合部よりも外側に突出して配されるので、接続部材にリード端子を接合する作業の際に固定部が作業の妨げにはならない。また、上記構成によれば、接続部材を絶縁材料からなる保持部材に保持させたうえで、リード端子が接合されるので、接続部材とリード端子との接合作業を行いやすい。
The present invention may have the following configurations.
An insulating material, a holding member for holding the connecting member, the said connecting member is disposed in the direction in which the fixed portion fixed to the holding member intersecting the terminal junction Rutotomoni the terminal junction It may be provided so as to protrude outward in the longitudinal direction of the terminal joint .
With such a configuration, in the connection member, the fixed portion fixed to the holding member is arranged in a direction intersecting the terminal joint portion to be joined to the lead terminal and projecting outward from the terminal joint portion. Therefore, the fixing portion does not hinder the work when the lead terminal is joined to the connection member. Moreover, according to the said structure, since a lead terminal is joined after hold | maintaining a connection member to the holding member consisting of an insulating material, it is easy to perform the joining operation | work of a connection member and a lead terminal.

本発明によれば、限られたスペースで、相違する金属材料からなるリード端子間を電気的に接続可能とした蓄電モジュールを提供する。   According to the present invention, there is provided a power storage module capable of electrically connecting lead terminals made of different metal materials in a limited space.

実施形態１の蓄電モジュールを正面側から表した斜視図The perspective view showing the electrical storage module of Embodiment 1 from the front side 蓄電モジュールの背面図Rear view of power storage module 蓄電素子群に接続部材を取り付けた様子を背面側から示した斜視図The perspective view which showed a mode that the connection member was attached to the electrical storage element group from the back side 蓄電素子群に接続部材を接合した様子を示す側面図Side view showing a state in which a connection member is joined to a storage element group 蓄電素子群に保持部材を取り付けた様子を示す側面図Side view showing a state in which a holding member is attached to the storage element group 接続部材が取り付けられた保持部材の斜視図The perspective view of the holding member to which the connection member was attached 接続部材が取り付けられた保持部材の正面図Front view of holding member to which connecting member is attached 図７のＡ−Ａ線における断面図Sectional drawing in the AA line of FIG. 接続部材の斜視図Perspective view of connecting member

＜実施形態１＞
本発明の実施形態１を図１ないし図９によって説明する。図面においては、複数の同一部材のうち一の部材にのみ符号を付し、他の同一部材については符号を省略する場合がある。以下の説明において、図２における上側を上とし、下側を下とし、図４における右側を前方（正面側）とし左側を後方（背面側）とする。 <Embodiment 1>
A first embodiment of the present invention will be described with reference to FIGS. In the drawings, only one member of the plurality of identical members may be given a reference numeral, and the reference numerals may be omitted for other identical members. In the following description, the upper side in FIG. 2 is the upper side, the lower side is the lower side, the right side in FIG. 4 is the front (front side), and the left side is the rear (back side).

本実施形態の蓄電モジュール１０は、側縁から突出するリード端子１３を有する蓄電素子１２を複数（本実施形態では、２４個）積層してなる蓄電素子群１１と、蓄電素子１２のリード端子１３に接合され蓄電素子１２間を電気的に接続する接続部材３０および接続部材３０を保持する保持部材２１を有する配線モジュール２０と、配線モジュール２０を覆うカバー４０と、を備える。   The power storage module 10 according to the present embodiment includes a power storage element group 11 in which a plurality of (24 in the present embodiment) power storage elements 12 each having a lead terminal 13 protruding from a side edge are stacked, and a lead terminal 13 of the power storage element 12. And a wiring module 20 having a connection member 30 that is electrically connected to each other and the holding member 21 that holds the connection member 30, and a cover 40 that covers the wiring module 20.

（カバー４０）
蓄電モジュール１０は、図１に示すように、蓄電素子群１１の正面側と背面側（リード端子１３が導出される端部側）に配される絶縁樹脂製のカバー４０を備える。蓄電素子群１１の正面側のカバー４０Ａおよび背面側のカバー４０Ｂには、それぞれ、蓄電素子１２の状態を検知する検知端子３７と図示しない電池コントロールユニット（ＥＣＵ）等の機器とを電気的に接続するコネクタ５０を固定するコネクタ固定部４１が、設けられている（図１および図２を参照）。また、正面側のカバー４０Ａおよび背面側のカバー４０Ｂには、コネクタハウジング５１の上端から導出される電線Ｗ２を固定する一対の電線固定片４２が設けられている。さらに正面側のカバー４０Ａおよび背面側のカバー４０Ｂには、保持部材２１のカバー取付突部２４を受け入れるカバー取付孔４３が設けられている（図１を参照）。 (Cover 40)
As shown in FIG. 1, the power storage module 10 includes a cover 40 made of an insulating resin disposed on the front side and the back side (the end side from which the lead terminal 13 is led out) of the power storage element group 11. A detection terminal 37 for detecting the state of the storage element 12 and a device such as a battery control unit (ECU) (not shown) are electrically connected to the front cover 40A and the back cover 40B of the storage element group 11, respectively. The connector fixing | fixed part 41 which fixes the connector 50 to perform is provided (refer FIG. 1 and FIG. 2). The front cover 40 </ b> A and the back cover 40 </ b> B are provided with a pair of electric wire fixing pieces 42 for fixing the electric wires W <b> 2 led out from the upper end of the connector housing 51. Further, the cover 40A on the front side and the cover 40B on the back side are provided with cover mounting holes 43 for receiving the cover mounting protrusions 24 of the holding member 21 (see FIG. 1).

正面側カバー４０Ａの上端と下端には蓄電素子群１１と外部機器（図示せず）とを接続する外部接続バスバー３６が導出されるバスバー導出孔４４が設けられている。外部機器としては、たとえば、別の蓄電モジュール１０やインバータ等があげられる。外部接続バスバー３６は、銅又は銅合金、アルミニウムまたはアルミニウム合金等の導電性の金属材料からなり、外部機器と電気的に接続される接続孔３６Ａが貫通して設けられている。   Bus bar lead-out holes 44 through which external connection bus bars 36 for connecting the power storage element group 11 and external devices (not shown) are led out are provided at the upper and lower ends of the front cover 40A. Examples of the external device include another power storage module 10 and an inverter. The external connection bus bar 36 is made of a conductive metal material such as copper, copper alloy, aluminum, or aluminum alloy, and is provided with a connection hole 36A that is electrically connected to an external device.

（蓄電素子１２）
蓄電素子群１１を構成する蓄電素子１２としては、二次電池、キャパシタ、コンデンサ等、必要に応じて任意の蓄電素子１２を用いることができる。本実施形態に係る蓄電素子１２としては、二次電池が用いられている。 (Storage element 12)
As the storage element 12 constituting the storage element group 11, any storage element 12 such as a secondary battery, a capacitor, or a capacitor can be used as necessary. A secondary battery is used as the electricity storage element 12 according to the present embodiment.

蓄電素子１２は、上方から見て略長方形状をなしている。蓄電素子１２は、略長方形状をなす一対のラミネートフィルムの側縁を溶着してなる容器１４と、容器１４の内部に収容された図示しない蓄電要素と、容器１４の内部において蓄電要素に接続されると共に、容器１４の側縁から外部に導出されるリード端子１３と、を備える。   The electricity storage element 12 has a substantially rectangular shape when viewed from above. The electricity storage element 12 is connected to the electricity storage element inside the container 14, the electricity storage element (not shown) housed in the container 14, which is formed by welding the side edges of a pair of laminated films having a substantially rectangular shape. And lead terminals 13 led out from the side edges of the container 14.

（リード端子１３）
本実施形態では、容器１４の両側縁（前方及び後方の側縁）から、正極および負極のリード端子１３（正極リード端子１３Ａ，負極リード端子１３Ｂ）が導出されている。正極リード端子１３Ａと負極リード端子１３Ｂとは相違する金属材料からなり、本実施形態において、正極リード端子１３Ａはアルミニウムまたはアルミニウム合金製であり、負極リード端子１３Ｂは銅または銅合金製である。 (Lead terminal 13)
In the present embodiment, positive and negative lead terminals 13 (positive lead terminal 13A and negative lead terminal 13B) are led out from both side edges (front and rear side edges) of the container 14. The positive electrode lead terminal 13A and the negative electrode lead terminal 13B are made of different metal materials. In the present embodiment, the positive electrode lead terminal 13A is made of aluminum or an aluminum alloy, and the negative electrode lead terminal 13B is made of copper or a copper alloy.

詳細は後述するが、蓄電素子１２は、２個ずつ極性の同じリード端子１３が上下に配されるように積層され、接続部材３０を介して電気的に接続されることにより並列に接続されている。   As will be described in detail later, the power storage elements 12 are stacked so that two lead terminals 13 having the same polarity are arranged one above the other and are connected in parallel by being electrically connected via the connection member 30. Yes.

上端部に配される蓄電素子１２の負極リード端子１３Ｂおよび、下端部に配される蓄電素子１２の正極リード端子１３Ａには、それぞれ、外部機器と電気的に接続される外部接続バスバー３６が電気的に接続される。   An external connection bus bar 36 that is electrically connected to an external device is electrically connected to the negative electrode lead terminal 13B of the power storage element 12 disposed at the upper end and the positive electrode lead terminal 13A of the power storage element 12 disposed at the lower end. Connected.

（配線モジュール２０）
配線モジュール２０は蓄電素子群１１に取り付けられて、複数の蓄電素子１２を電気的に接続するためのものである。配線モジュール２０は、蓄電素子１２のリード端子１３に接続されて複数の蓄電素子１２を電気的に接続する接続部材３０と、接続部材３０を保持する保持部材２１と、を備える。 (Wiring module 20)
The wiring module 20 is attached to the power storage element group 11 to electrically connect the plurality of power storage elements 12. The wiring module 20 includes a connection member 30 that is connected to the lead terminal 13 of the power storage element 12 and electrically connects the plurality of power storage elements 12, and a holding member 21 that holds the connection member 30.

（保持部材２１）
接続部材３０を保持する保持部材２１は絶縁材料からなる。本実施形態では、蓄電素子群１１には、複数の保持部材２１を連結してなるものが取り付けられる。図５における上端に配される保持部材２１には、上から２番目の保持部材２１に設けた連結孔２２に嵌りこんで連結される連結突部２３が設けられている。また図５における下端に配される保持部材２１には、下から２段目の保持部材２１の連結突部２３を受け入れる連結孔２２が設けられている。 (Holding member 21)
The holding member 21 that holds the connection member 30 is made of an insulating material. In the present embodiment, the power storage element group 11 is attached by connecting a plurality of holding members 21. The holding member 21 disposed at the upper end in FIG. 5 is provided with a connecting projection 23 that is fitted and connected to a connecting hole 22 provided in the second holding member 21 from the top. Further, the holding member 21 arranged at the lower end in FIG. 5 is provided with a connecting hole 22 for receiving the connecting protrusion 23 of the holding member 21 at the second stage from the bottom.

上下の端部に配される保持部材２１以外の保持部材２１には上方の保持部材２１の連結突部２３を受け入れる連結孔２２と、下方の保持部材２１の連結孔２２に嵌りこむ連結突部２３がそれぞれ設けられている。   The holding member 21 other than the holding member 21 arranged at the upper and lower ends has a connecting hole 22 that receives the connecting protrusion 23 of the upper holding member 21 and a connecting protrusion that fits into the connecting hole 22 of the lower holding member 21. 23 are provided.

また、上端に配される保持部材２１および下端に配される保持部材２１には、カバー４０のカバー取付孔４３に嵌りこむカバー取付突部２４が外側に突出形成されている。   Further, the holding member 21 arranged at the upper end and the holding member 21 arranged at the lower end are formed with a cover mounting projection 24 protruding outside in a cover mounting hole 43 of the cover 40.

各保持部材２１には、図６および図８に示すように、接続部材３０の固定部３３を抜け止めする抜け止め突部２５と、接続部材３０の固定部３３を押さえる押さえ片２６とが設けられている。また、各保持部材２１には、検知端子３７のバレル部３９を固定する端子固定部２７と、検知端子３７に接続される電線Ｗ１を導出する電線導出部２８と、当該電線Ｗ１が配索される電線配索部２９とが設けられている。   As shown in FIGS. 6 and 8, each holding member 21 is provided with a retaining protrusion 25 for retaining the fixing portion 33 of the connecting member 30 and a pressing piece 26 for pressing the fixing portion 33 of the connecting member 30. It has been. Each holding member 21 is wired with a terminal fixing portion 27 for fixing the barrel portion 39 of the detection terminal 37, a wire lead-out portion 28 for leading out the electric wire W1 connected to the detection terminal 37, and the electric wire W1. And an electric wire routing portion 29 are provided.

検知端子３７は蓄電素子１２の電圧等を検知するためのものであって、詳細は図示しないが、接続部材３０に取り付けられる取付爪と、電線Ｗ１の端末が接続されるバレル部とを有する。   Although the detection terminal 37 is for detecting the voltage etc. of the electrical storage element 12, although it does not show in detail, it has the attachment nail | claw attached to the connection member 30, and the barrel part to which the terminal of the electric wire W1 is connected.

（接続部材３０）
リード端子１３が接続される接続部材３０は、図９に示すように、正極リード端子１３Ａに接続されるとともに正極リード端子１３Ａと同じ金属材料からなる第１金属部３１と、負極リード端子１３Ｂに接続されるとともに負極リード端子１３Ｂと同じ金属材料からなる第２金属部３５と、を接合してなる。第１金属部３１と第２金属部３５とは、たとえば冷間圧接や溶接等公知の方法により接合される。本実施形態において第１金属部３１はアルミニウムまたはアルミニウム合金製の金属板材からなり、第２金属部３５は銅または銅合金製の金属板材からなる。 (Connecting member 30)
As shown in FIG. 9, the connecting member 30 to which the lead terminal 13 is connected is connected to the positive lead terminal 13A and the first metal part 31 made of the same metal material as the positive lead terminal 13A, and the negative lead terminal 13B. The second metal part 35 made of the same metal material as that of the negative electrode lead terminal 13 </ b> B is connected and joined. The first metal part 31 and the second metal part 35 are joined by a known method such as cold welding or welding. In the present embodiment, the first metal portion 31 is made of a metal plate made of aluminum or an aluminum alloy, and the second metal portion 35 is made of a metal plate made of copper or a copper alloy.

接続部材３０において、第１金属部３１および第２金属部３５は、それぞれ、リード端子１３と接合される端子接合部３２と、第１金属部３１と第２金属部３５とが接合される部材接合部３４とを有する。接続部材３０の端子接合部３２には、検知端子３７を取り付ける長方形状の端子取付孔３２Ｂが形成されている。   In the connection member 30, the first metal part 31 and the second metal part 35 are respectively a terminal joint part 32 joined to the lead terminal 13 and a member to which the first metal part 31 and the second metal part 35 are joined. And a joint portion 34. A rectangular terminal attachment hole 32 </ b> B for attaching the detection terminal 37 is formed in the terminal joint portion 32 of the connection member 30.

端子接合部３２と部材接合部３４とは、交差する方向に配されている。詳しくは、部材接合部３４は、第１金属部３１を構成する金属板材および第２金属部３５を構成する金属板材の、長手方向における一対の側縁のうち一方の側縁を略垂直に折り曲げることにより形成される。部材接合部３４の接合面３４Ａは端子接合部３２のリード端子１３が接合される接合面３２Ａに対し、概ね垂直となるように設定されている。部材接合部３４の長手方向の寸法は、端子接合部３２の長手方向の寸法よりも小さく設定されている。   The terminal joint 32 and the member joint 34 are arranged in the intersecting direction. Specifically, the member joining portion 34 bends one side edge of a pair of side edges in the longitudinal direction of the metal plate material constituting the first metal portion 31 and the metal plate material constituting the second metal portion 35 substantially vertically. Is formed. The joining surface 34A of the member joining portion 34 is set to be substantially perpendicular to the joining surface 32A to which the lead terminal 13 of the terminal joining portion 32 is joined. The dimension in the longitudinal direction of the member joint 34 is set smaller than the dimension in the longitudinal direction of the terminal joint 32.

また、接続部材３０には保持部材２１に固定される固定部３３が端子接合部３２に対して交差する方向であるとともに、端子接合部３２よりも外側に突出して設けられている。詳しくは、固定部３３は、第１金属部３１を構成する金属板材および第２金属部３５を構成する金属板材の長手方向における一側縁のうち、部材接合部３４が形成されている側縁とは反対側の側縁を垂直に折り曲げることにより形成されており、接続部材３０の４つの角部にそれぞれ設けられている。固定部３３は、保持部材２１の抜け止め突部２５により前後方向の移動が規制されるとともに、保持部材２１の押さえ片２６により上下方向の移動が規制されることで、保持部材２１に固定されている。固定部３３は端子接合部３２の（長手方向の）端部よりも外側に突出しており、当該突出している部分（突出部３３Ａ）が保持部材２１により固定されている。   The connecting member 30 is provided with a fixing portion 33 fixed to the holding member 21 in a direction intersecting the terminal joint portion 32 and projecting outward from the terminal joint portion 32. Specifically, the fixed portion 33 is a side edge on which the member joining portion 34 is formed among one side edge in the longitudinal direction of the metal plate material constituting the first metal portion 31 and the metal plate material constituting the second metal portion 35. Are formed by bending the side edge opposite to the vertical direction, and are provided at the four corners of the connecting member 30, respectively. The fixing portion 33 is fixed to the holding member 21 by restricting movement in the front-rear direction by the retaining protrusion 25 of the holding member 21 and by restricting movement in the vertical direction by the pressing piece 26 of the holding member 21. ing. The fixing portion 33 protrudes outward from the end portion (in the longitudinal direction) of the terminal joint portion 32, and the protruding portion (protruding portion 33 </ b> A) is fixed by the holding member 21.

蓄電素子群１１においては、同じ極性のリード端子１３が上下に２つずつ並ぶように蓄電素子１２が積層されている。具体的には、蓄電素子群１１において、前方のリード端子１３は上から順に負極、負極、正極、正極、負極、負極…の順に並んでおり、後方のリード端子１３は上から順に、正極、正極、負極、負極、正極、正極…の順に並んでいる。   In the power storage element group 11, the power storage elements 12 are stacked such that two lead terminals 13 having the same polarity are arranged one above the other. Specifically, in the power storage element group 11, the front lead terminals 13 are arranged in order of negative electrode, negative electrode, positive electrode, positive electrode, negative electrode, negative electrode,... From the top, and the rear lead terminal 13 is arranged in order from the top. They are arranged in the order of positive electrode, negative electrode, negative electrode, positive electrode, positive electrode,.

蓄電素子群１１の前方において、上から２つの負極リード端子１３Ｂは第２金属部３５のみからなる端部接続部材３０Ａの端子接合部３２に接合されており、下から２つの正極リード端子１３Ａが第２金属部３５のみからなる端部接続部材３０Ａの端子接合部３２に接合されている。これら以外のリード端子１３は第１金属部３１と第２金属部３５とを接合してなる接続部材３０の端子接合部３２に２つずつ接合されている。   The two negative electrode lead terminals 13B from the top are joined to the terminal joint part 32 of the end connection member 30A made of only the second metal part 35 in front of the power storage element group 11, and the two positive electrode lead terminals 13A are joined from the bottom. It is joined to the terminal joint portion 32 of the end connection member 30 </ b> A made of only the second metal portion 35. The lead terminals 13 other than these are joined two by two to the terminal joining portion 32 of the connecting member 30 formed by joining the first metal portion 31 and the second metal portion 35.

リード端子１３と接続部材３０の端子接合部３２との溶接方法およびリード端子１３と外部接続バスバー３６との溶接方法としては、レーザー溶接、超音波溶接等の方法があげられる。   Examples of the welding method between the lead terminal 13 and the terminal joint portion 32 of the connection member 30 and the welding method between the lead terminal 13 and the external connection bus bar 36 include laser welding and ultrasonic welding.

（蓄電モジュール１０の組み立て方法）
２４個の蓄電素子１２のリード端子１３の端部を略垂直下方に屈曲させておき、上下に隣り合う２つのリード端子１３が同極性となるように、積層しておく。図９に示す接続部材３０を１１個と端部接続部材３０Ａを２個用意する。 (Assembly method of power storage module 10)
The ends of the lead terminals 13 of the 24 power storage elements 12 are bent substantially vertically downward, and are stacked so that the two lead terminals 13 adjacent to each other in the vertical direction have the same polarity. Eleven connecting members 30 and two end connecting members 30A shown in FIG. 9 are prepared.

接続部材３０は、第１金属部３１を構成する金属板材と、第２金属部３５を構成する金属板材を、所定形状にプレス加工したのち、第１金属部３１の部材接合部３４と第２金属部３５とを接合することにより作製することができる。   The connection member 30 presses the metal plate material constituting the first metal part 31 and the metal plate material constituting the second metal part 35 into a predetermined shape, and then presses the member joining part 34 of the first metal part 31 and the second metal member 31. It can be manufactured by joining the metal part 35.

次に、保持部材２１に接続部材３０を取り付ける。保持部材２１に接続部材３０を取り付けると、接続部材３０の固定部３３は、保持部材２１の抜け止め突部２５により前後方向の移動が規制されるとともに、保持部材２１の押さえ片２６により上下方向の移動が規制されることで、保持部材２１に固定される。   Next, the connection member 30 is attached to the holding member 21. When the connection member 30 is attached to the holding member 21, the movement of the fixing portion 33 of the connection member 30 in the front-rear direction is restricted by the retaining projection 25 of the holding member 21, and the vertical direction by the pressing piece 26 of the holding member 21. By being restricted from moving, the holding member 21 is fixed.

保持部材２１に固定された接続部材３０の端子取付孔３２Ｂに検知端子３７の取付爪を差し込むとともに保持部材２１の端子固定部２７に検知端子３７のバレル部を固定し、電線導出部２８から検知端子３７に接続された電線Ｗ１を導出させると検知端子３７が固定される。   An attachment claw of the detection terminal 37 is inserted into the terminal attachment hole 32B of the connection member 30 fixed to the holding member 21, and the barrel portion of the detection terminal 37 is fixed to the terminal fixing portion 27 of the holding member 21, and detection is performed from the wire lead-out portion 28. When the electric wire W1 connected to the terminal 37 is led out, the detection terminal 37 is fixed.

次に、複数の保持部材２１を連結して１枚のプレート状とし検知端子３７に接続されている電線Ｗ１を保持部材２１の電線配索部２９に配索し、蓄電素子群１１の前方と後方に取り付ける配線モジュール２０を作製する。   Next, the plurality of holding members 21 are connected to form a single plate, and the electric wire W1 connected to the detection terminal 37 is routed to the wire routing portion 29 of the holding member 21, The wiring module 20 to be attached to the rear is produced.

続いて配線モジュール２０を蓄電素子群１１の前方と後方に配し、リード端子１３と接続部材３０の端子接合部３２とをレーザー溶接等の溶接方法により接合する。このとき前方に取り付ける配線モジュール２０には、外部接続バスバー３６も接続する。   Subsequently, the wiring module 20 is disposed in front of and behind the power storage element group 11, and the lead terminal 13 and the terminal joint portion 32 of the connection member 30 are joined by a welding method such as laser welding. At this time, the external connection bus bar 36 is also connected to the wiring module 20 attached to the front.

次に、正面側カバー４０Ａと背面側カバー４０Ｂとを取り付けて、検知端子３７に接続された電線Ｗ１をコネクタ５０を介して外部機器と電気的に接続すると図１に示す蓄電モジュール１０が得られる。   Next, when the front cover 40A and the back cover 40B are attached and the electric wire W1 connected to the detection terminal 37 is electrically connected to an external device via the connector 50, the power storage module 10 shown in FIG. 1 is obtained. .

（本実施形態の作用、効果）
次に、本実施形態の作用、効果について説明する。本実施形態において、接続部材３０において、二つの金属部３１，３５（第１金属部３１と第２金属部３５）同士が接合される部材接合部３４と、リード端子１３と接合される端子接合部３２とが垂直な方向（交差する方向）に配されるので、接続部材３０にリード端子１３を接合する際に異種金属が重なる領域にリード端子１３が接合されることがない。 (Operation and effect of this embodiment)
Next, the operation and effect of this embodiment will be described. In the present embodiment, in the connection member 30, a member joint 34 where the two metal parts 31 and 35 (the first metal part 31 and the second metal part 35) are joined to each other, and a terminal joint where the lead terminal 13 is joined. Since the portion 32 is arranged in a direction perpendicular to (intersects with) the lead terminal 13 is not joined to the region where the dissimilar metals overlap when the lead terminal 13 is joined to the connecting member 30.

その結果、本実施形態によれば、端子接合部３２の全域にリード端子１３を溶接することができるので、限られたスペースで、相違する金属材料からなるリード端子１３間を電気的に接続可能とした蓄電モジュール１０を提供することができる。また、本実施形態によれば、正極リード端子１３Ａが同じ金属材料からなる第１金属部３１に接合され、かつ負極リード端子１３Ｂが同じ金属材料からなる第２金属部３５に接合されるので、リード端子１３と接続部材３０との接合部分において異種金属の接触による腐食が発生しにくい。   As a result, according to the present embodiment, since the lead terminals 13 can be welded to the entire area of the terminal joint portion 32, the lead terminals 13 made of different metal materials can be electrically connected in a limited space. The power storage module 10 can be provided. Further, according to the present embodiment, the positive electrode lead terminal 13A is bonded to the first metal part 31 made of the same metal material, and the negative electrode lead terminal 13B is bonded to the second metal part 35 made of the same metal material. Corrosion due to contact of dissimilar metals hardly occurs at the joint portion between the lead terminal 13 and the connection member 30.

また、本実施形態において、接続部材３０には保持部材２１に固定される固定部３３が端子接合部３２に対して垂直な方向（交差する方向）であるとともに、端子接合部３２の端部よりも外側に突出して設けられているから、固定部３３は、リード端子１３と接合される端子接合部３２に対して交差する方向で、かつ、端子接合部３２よりも外側に突出して配される。その結果、本実施形態によれば、接続部材３０にリード端子１３を接合する作業の際に固定部３３が作業の妨げにはならない。加えて、本実施形態によれば、接続部材３０を保持部材２１に保持させたうえで、リード端子１３が接合されるので、接続部材３０とリード端子１３との接合作業を行いやすく作業性に優れる。   Further, in the present embodiment, the connecting member 30 has a fixing portion 33 fixed to the holding member 21 in a direction perpendicular to (intersects with) the terminal joint portion 32, and from an end portion of the terminal joint portion 32. The fixing portion 33 is arranged in a direction intersecting the terminal joint portion 32 joined to the lead terminal 13 and projecting outward from the terminal joint portion 32. . As a result, according to the present embodiment, the fixing portion 33 does not hinder the work when the lead terminal 13 is joined to the connection member 30. In addition, according to the present embodiment, since the lead terminal 13 is joined after the connection member 30 is held by the holding member 21, the joining work between the connection member 30 and the lead terminal 13 can be easily performed. Excellent.

なお、本実施形態によれば、蓄電素子１２を２個ずつ並列接続した蓄電素子群１１を備えるので、蓄電素子群１１を構成するすべての蓄電素子１２を直列に接続する場合よりも、接続部材３０の数および保持部材２１の数を減らすことができる。   In addition, according to this embodiment, since the storage element group 11 in which the two storage elements 12 are connected in parallel is provided, the connecting member is more than in the case where all the storage elements 12 constituting the storage element group 11 are connected in series. The number of 30 and the number of holding members 21 can be reduced.

＜他の実施形態＞
本明細書で開示の技術は上記記述及び図面によって説明した実施形態に限定されるものではなく、例えば次のような実施形態であってもよい。
（１）上記実施形態では、接続部材３０には、端子接合部３２に対して垂直な方向であるとともに端子接合部３２よりも外側に突出して設けられている固定部３３を備える接続部材３０を示したが、固定部の構成はこれに限定されない。また、接続部材は、固定部を備えない構成であっても構わない。
（２）上記実施形態ではアルミニウムまたはアルミニウム合金製の正極リード端子１３Ａと、銅又は銅合金製の負極リード端子１３Ｂを有する蓄電素子１２を示したが、正極リード端子１３Ａおよび負極リード端子１３Ｂを構成する材料は相違していればよく、上記材料に限定されない。
（３）上記実施形態では、アルミニウムまたはアルミニウム合金製の第１金属部３１と、銅又は銅合金製の第２金属部３５とを接合してなる接続部材３０を示したが、第１金属部が正極リード端子と同じ金属材料からなり、第２金属部が負極リード端子と同じ金属材料から構成されているのであればこれに限定されない。
（４）上記実施形態では、２４個の蓄電素子１２からなる蓄電素子群１１を示したが、蓄電素子群を構成する蓄電素子の数は２４個未満でも２４個より多くてもよい。
（５）上記実施形態では、蓄電素子１２を２個ずつ並列に接続したものを示したが、全ての蓄電素子を直列に接続してもよいし、蓄電素子を３個以上並列に接続してもよい。
（６）上記実施形態では蓄電素子１２として二次電池を用いる例を示したが、蓄電素子としてキャパシタ、コンデンサ等を用いてもよい。 <Other embodiments>
The technology disclosed in this specification is not limited to the embodiment described with reference to the above description and drawings, and may be, for example, the following embodiment.
(1) In the above-described embodiment, the connection member 30 includes the fixing member 33 provided in the direction perpendicular to the terminal joint portion 32 and protruding outward from the terminal joint portion 32. Although shown, the configuration of the fixing portion is not limited to this. Further, the connection member may be configured not to include the fixing portion.
(2) Although the storage element 12 having the positive electrode lead terminal 13A made of aluminum or aluminum alloy and the negative electrode lead terminal 13B made of copper or copper alloy is shown in the above embodiment, the positive electrode lead terminal 13A and the negative electrode lead terminal 13B are configured. The material to be used may be different and is not limited to the above materials.
(3) In the above embodiment, the connection member 30 formed by joining the first metal part 31 made of aluminum or aluminum alloy and the second metal part 35 made of copper or copper alloy is shown. If it consists of the same metal material as a positive electrode lead terminal and the 2nd metal part is comprised from the same metal material as a negative electrode lead terminal, it will not be limited to this.
(4) In the above embodiment, the power storage element group 11 including the 24 power storage elements 12 is shown. However, the number of power storage elements constituting the power storage element group may be less than 24 or more than 24.
(5) In the above embodiment, two power storage elements 12 are connected in parallel. However, all power storage elements may be connected in series, or three or more power storage elements may be connected in parallel. Also good.
(6) In the above embodiment, an example in which a secondary battery is used as the power storage element 12 has been described. However, a capacitor, a capacitor, or the like may be used as the power storage element.

１０…蓄電モジュール
１１…蓄電素子群
１２…蓄電素子
１３…リード端子
１３Ａ…正極リード端子
１３Ｂ…負極リード端子
２１…保持部材
２５…抜け止め突部
２６…押さえ片
３０…接続部材
３０Ａ…端部接続部材
３１…第１金属部
３２…端子接合部
３２Ａ…接合面
３３…固定部
３３Ａ…突出部
３４…部材接合部
３４Ａ…接合面
３５…第２金属部
４０…カバー DESCRIPTION OF SYMBOLS 10 ... Power storage module 11 ... Power storage element group 12 ... Power storage element 13 ... Lead terminal 13A ... Positive electrode lead terminal 13B ... Negative electrode lead terminal 21 ... Holding member 25 ... Retaining protrusion 26 ... Holding piece 30 ... Connection member 30A ... End connection Member 31 ... 1st metal part 32 ... Terminal joining part 32A ... Joining surface 33 ... Fixing part 33A ... Protruding part 34 ... Member joining part 34A ... Joining surface 35 ... 2nd metal part 40 ... Cover

Claims (2)

側縁から突出する正極および負極のリード端子を有する蓄電素子を複数積層してなる蓄電素子群と、前記リード端子に接合され前記蓄電素子を電気的に接続する接続部材と、を備え、
正極リード端子と負極リード端子とは相違する金属材料からなり、
前記接続部材は、前記正極リード端子に接続されるとともに前記正極リード端子と同じ金属材料からなる第１金属部と、前記負極リード端子に接続されるとともに前記負極リード端子と同じ金属材料からなる第２金属部と、を接合してなり、
前記第１金属部および前記第２金属部は、それぞれ、前記リード端子と接合される端子接合部と、前記第１金属部と前記第２金属部とが接合される部材接合部とを有し、
前記端子接合部と前記部材接合部とは、交差する方向に配されており、
前記部材接合部は、前記端子接合部の長手方向における一対の側縁のうち一方の側縁に連なって形成されており、
前記第１金属部と前記第２金属部のそれぞれの前記端子接合部には、前記リード端子が２つ以上接合されている蓄電モジュール。 A power storage element group formed by stacking a plurality of power storage elements having positive and negative lead terminals protruding from a side edge, and a connection member that is joined to the lead terminals and electrically connects the power storage elements,
The positive electrode lead terminal and the negative electrode lead terminal are made of different metal materials,
The connecting member is connected to the positive electrode lead terminal and is made of the same metal material as the positive electrode lead terminal, and connected to the negative electrode lead terminal and made of the same metal material as the negative electrode lead terminal. Two metal parts are joined,
Each of the first metal part and the second metal part includes a terminal joint part joined to the lead terminal, and a member joint part joined to the first metal part and the second metal part. ,
The terminal joint portion and the member joint portion are arranged in a crossing direction,
The member joint portion is formed continuously to one side edge of the pair of side edges in the longitudinal direction of the terminal joint portion ,
An electrical storage module in which two or more lead terminals are joined to each of the terminal joints of the first metal part and the second metal part . 絶縁材料からなり、前記接続部材を保持する保持部材を備え、
前記接続部材には前記保持部材に固定される固定部が前記端子接合部に対して交差する方向に配されるとともに前記端子接合部よりも前記端子接合部の長手方向外側に突出して設けられている請求項１に記載の蓄電モジュール。 It is made of an insulating material and includes a holding member that holds the connection member,
The connecting member is provided with a fixed portion fixed to the holding member in a direction intersecting the terminal joint portion and is provided to protrude outward in the longitudinal direction of the terminal joint portion from the terminal joint portion. The power storage module according to claim 1.
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